File or like tool.



H. PUPPE.

FILE OR LIKE TOOL.

APPLICATION FILED 0012s, 1911.

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FILE 0R LIKE TOOL.

APPLICATION FILED 0012s, 1911.

1,035,736. Patented Aug. 13, 1912.

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HENRY PUPPE, OF NEBRASKA CITY, NEBRASKA.

FILE 0R LIKE TOOL.

To all whom it may concern:

Be it known that I, HENRY PUIPE, a subjeet of the German Emperor,residing at Nebraska City, in the county of ()toe and State of Nebraska,have invented certain new and useful Improvements in Files or LikeTools, of which the following is a specification.

The present invention relates to files and has for its object to providea file of great efficiency and durability.

The hitherto used files are generally made of soft steel, so that theteeth can be cut by a chisel. This has the disadvantage that the teethnever can be made very sharp and will not affect hard metals.Furthern'iore, when the teeth become blunt, the file is practicallyrendered useless, for in order to resharpen it, it first must beannealed, its cutting surfaces ground off, new teeth chiseled and thenhardened. These manipulations, evidently, render the work very difficultand more expensive than the cost of a new file.

According to my invention, the file is composed of a great number ofindividual metal blades or plates having their upper or lower edges orboth beveled to form teeth and which are loosely mounted in anadjustable frame, so that they can be tightly pressed against oneanother either in up right or operative position, or, when the teethbecome blunt, they can be adjusted so that their teeth lie in plane andcan be sharpened by means of a grindstone. Owing to this novelconstruction, my file may be made of the hardest steel, to affect anykind of metal, and if any one or more of the individual plates becomeworn out or damaged the same may be readily replaced by new ones withoutrendering the file useless. Another advantage of my new tool is that theuser of the file can sharpen it him self by means of a grindstone andall those processes necessary with ordinary files are obviated.

My invention thus relates to the novel construction, combination andarrangement of parts as will be hereinafter specified and claimed.

In the accompanying drawing, in which similar reference letters denotecorresponding parts, Figure 1 is a side elevation of my file in whichthe individual plates are shown in operative position; Fig. 1 is areduced similar view thereof showing the same adjusted in position forsharpening;

Specification of Letters Patent.

Application filed October 26, 1911.

rammed Aug. 13, 1912.

Serial No. 656,974.

Fig. 2 is a plan View of the file; Fig. 3 1s a cross section on line 33of Fig. 1; Fig. 3 is a cross section on line Zi -3 of Fig. 1; Fig. 4t isan end view; Figs. 5 and 6 are details and Fig. 7 illustrates the mannerof sharpening the file.

My file consists of a number of individual blades or plates a which areloosely mounted in a frame composed of lateral bars I), Z), there beingone pair of such bars on each side of the blades or plates. The bars ofeach pair are superposed and parallel and connected by several links 0.The rear ends of the two pairs of bars I), b are pivoted to verticallyrocking disks (Z, which are centrally fulcrumed in lateral arms 6projecting from a head piece f. Between the front ends of the two pairsof bars a plate 9 is inserted, which by screws it may be connected toone another, to which end the several bars are perforated at their frontextremities and the plate g has screw threaded bores. The head piece fhas a cylindrical bore f and rotatively borne therein is a cylindricalextension 2' of the handle j. By a collar 2" or the like, hearing in anannular groove f of the bore f the longitudinal displacement of thehandle or its extension is prevented. The extension 2' has a threadedbore 70 and forms a nut for a threaded spindle Z centrally secured inand projecting outwardly from the handle. At its forward end the screwspindle has pivotally secured to it at Z a slotted plate m substantiallyof the same size as the blades a, which plate with its slots m en gagesthe bars b, b of the frame.

The blades a are all of equal size and are mounted on the frame betweenthe plates m and g and the forward face a (Fig. 5) of each blade isvertically corrugated. The blades are substantially T-shaped and theextended portions (1 thereof bear partly against the upper and partlyagainst the lower edges of the bars 6, b. The blades in assembledposition in the frame rest face to face against one another with theircorrugated surfaces directed forwardly. The upper and lower edges a a ofthe blades are beveled to form sharp cutting edges or teeth.

In order to properly guide the loose blades, they are each provided withlateral recesses or notches n and secured to the upper face of the upperbar 6 and the lower face of the lower bar I) on each side of the frameare longitudinal bars 0 which are eX- tended inwardly to loosely engagethe said notches n in the blades a. The corrugations on the frontsurfaces and the beveled edges of the individual plates togetherconstitute the teeth of the file. In operative position, the blades areheld upright and are tightened between the plates 9 and m by the spindleZ.

When the upper or lower cutting edges of the blades become blunt, theblades can be put in inclined position, so that the respective edges liein a plane and can be sharpened by means of a grindstone p as shown inFig. 7. To this end, the plate 9 is slackened and the plate on isshifted backward by unscrewing the spindle Z. The blades a can now betilted into the desired inclined position, the plate 9 being herebycaused to swing and the bars 5, b to move into the position shown inFig. 8. When the desired position of the blades is obtained, the plate 9is tightened and plate m moved forward by means of the spindle Z andtightened. The plate m being allowed to swing, will when brought incontact with tilted blades, also adopt an inclined position (Fig. 3 Theblades in this inclined position can then be ground off. hen the bladesare readjusted into upright position, their treated edges will be sharp.

Since the construction may be modified in various ways without departingfrom the spirit of my invention, 1 do not Wish to restrict myself to thedetails shown and described.

What I claim and desire to secure by LettersPatent is:

In a file, a frame consisting of movable lateral bars and a hollow headpiece connected to the latter, an adjustable member interposed betweenthe front ends of said bars, an adjustable pressure plate at the rearends of said bars, a rotary handle carried by said head piece, athreaded spindle in said handle working in said head piece and pivotallyconnected to said pressure plate and blades tiltably and loosely mountedon said bars between said rear pressure plate and front member.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY PUPPE.

Witnesses G. E. BERTHOLD, JOSEPH ZERBS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

